Vulnerability-Lookup

CVE-2026-107283 (GCVE-0-2026-107283)

Vulnerability from cvelistv5 – Published: 2026-10-07 21:24 – Updated: 2026-10-08 14:00

Title

AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source

Summary

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, Realm.Builder generates the HTTP Digest client nonce with ThreadLocalRandom rather than a cryptographically secure random source. Digest relies on an unpredictable cnonce to resist chosen-plaintext and credential precomputation attacks, so an observer able to infer generator state can reduce the protection of the authentication exchange. This issue is fixed in versions 3.0.12 and 2.16.1.

Severity

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-08 14:00 UTC

CWE

CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7572 records in the last 180 days details

References

5 references

URL	Tags
https://github.com/AsyncHttpClient/async-http-cli…	x_refsource_CONFIRM
https://github.com/AsyncHttpClient/async-http-cli…	x_refsource_MISC
https://github.com/AsyncHttpClient/async-http-cli…	x_refsource_MISC
https://github.com/AsyncHttpClient/async-http-cli…	x_refsource_MISC
https://github.com/AsyncHttpClient/async-http-cli…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
AsyncHttpClient	async-http-client	Affected: >= 3.0.0, < 3.0.12 Affected: >= 2.0.0, < 2.16.1	guessed

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-107283

Vulnerability from fkie_nvd - Published: 2026-10-07 22:17 - Updated: 2026-10-08 20:35

Severity

3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/AsyncHttpClient/async-http-client/commit/dca2d90db87f0144ea893a6858dca13c426d06b6
	security-advisories@github.com	https://github.com/AsyncHttpClient/async-http-client/commit/e1f5fc88fe211d3f64032c33b91093ba3d5e793d
	security-advisories@github.com	https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1
	security-advisories@github.com	https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12
	security-advisories@github.com	https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-mfj3-87qq-382v

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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GHSA-MFJ3-87QQ-382V

Vulnerability from github – Published: 2026-10-08 16:31 – Updated: 2026-10-08 16:31

Summary

AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source

Details

Impact

The client nonce used in HTTP Digest authentication was generated from ThreadLocalRandom, a fast but non-cryptographic pseudorandom number generator. RFC 7616 section 3.3 requires the cnonce to be unpredictable, since it is part of what protects the Digest exchange against chosen-plaintext and precomputation attacks on the credentials. An attacker able to observe or influence enough of the generator's output could reduce the unpredictability the protocol depends on. NTLM (and, on the 3.x line, SCRAM) in this client already use SecureRandom for their own nonces; Digest did not.

Affected versions

3.x: up to and including 3.0.11
2.x: up to and including 2.16.0

Patches

Fixed in 3.0.12 on the 3.x line and in 2.16.1 on the 2.x line. The cnonce is now generated with SecureRandom, matching the other authentication schemes in the client.

Workarounds

None available from application code.

Details

Realm.Builder's cnonce generation seeded its bytes from ThreadLocalRandom.current() rather than a SecureRandom instance.

Severity

3.7 (Low)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

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          "events": [
            {
              "introduced": "3.0.0"
            },
            {
              "fixed": "3.0.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 2.16.0"
      },
      "package": {
        "ecosystem": "Maven",
        "name": "org.asynchttpclient:async-http-client"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.0.0"
            },
            {
              "fixed": "2.16.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-107283"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-338"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-08T16:31:04Z",
    "nvd_published_at": "2026-10-07T22:17:04Z",
    "severity": "LOW"
  },
  "details": "### Impact\nThe client nonce used in HTTP Digest authentication was generated from ThreadLocalRandom, a fast but non-cryptographic pseudorandom number generator. RFC 7616 section 3.3 requires the cnonce to be unpredictable, since it is part of what protects the Digest exchange against chosen-plaintext and precomputation attacks on the credentials. An attacker able to observe or influence enough of the generator\u0027s output could reduce the unpredictability the protocol depends on. NTLM (and, on the 3.x line, SCRAM) in this client already use SecureRandom for their own nonces; Digest did not.\n\n### Affected versions\n* 3.x: up to and including 3.0.11\n* 2.x: up to and including 2.16.0\n\n### Patches\nFixed in 3.0.12 on the 3.x line and in 2.16.1 on the 2.x line. The cnonce is now generated with SecureRandom, matching the other authentication schemes in the client.\n\n### Workarounds\nNone available from application code.\n\n### Details\nRealm.Builder\u0027s cnonce generation seeded its bytes from ThreadLocalRandom.current() rather than a SecureRandom instance.",
  "id": "GHSA-mfj3-87qq-382v",
  "modified": "2026-10-08T16:31:04Z",
  "published": "2026-10-08T16:31:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-mfj3-87qq-382v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107283"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AsyncHttpClient/async-http-client/commit/dca2d90db87f0144ea893a6858dca13c426d06b6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AsyncHttpClient/async-http-client/commit/e1f5fc88fe211d3f64032c33b91093ba3d5e793d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/AsyncHttpClient/async-http-client"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random source"
}

UBUNTU-CVE-2026-107283 (CVE-2026-107283)

Vulnerability from osv_ubuntu – Published: 2026-10-08 00:00 – Updated: 2026-10-08 00:00 – Source website

Details

Severity

3.7 (Low)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-107283	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-107283	REPORT
	https://github.com/AsyncHttpClient/async-http-cli…	REPORT
	https://github.com/AsyncHttpClient/async-http-cli…	REPORT
	https://github.com/AsyncHttpClient/async-http-cli…	REPORT
	https://github.com/AsyncHttpClient/async-http-cli…	REPORT
	https://github.com/AsyncHttpClient/async-http-cli…	REPORT
	https://github.com/AsyncHttpClient/async-http-cli…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libasync-http-client-java",
            "binary_version": "1.6.5-2ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:14.04:LTS",
        "name": "async-http-client",
        "purl": "pkg:deb/ubuntu/async-http-client@1.6.5-2ubuntu0.1~esm1?arch=source\u0026distro=esm-infra-legacy/trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.5-1",
        "1.6.5-2",
        "1.6.5-2ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libasync-http-client-java",
            "binary_version": "1.6.5-4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "async-http-client",
        "purl": "pkg:deb/ubuntu/async-http-client@1.6.5-4?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.5-4"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libasync-http-client-java",
            "binary_version": "1.6.5-5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "async-http-client",
        "purl": "pkg:deb/ubuntu/async-http-client@1.6.5-5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.6.5-4",
        "1.6.5-5"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libasync-http-client-java",
            "binary_version": "2.6.0-1ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "async-http-client",
        "purl": "pkg:deb/ubuntu/async-http-client@2.6.0-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.6.0-1",
        "2.6.0-1ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libasync-http-client-java",
            "binary_version": "2.12.3-1ubuntu0.22.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "async-http-client",
        "purl": "pkg:deb/ubuntu/async-http-client@2.12.3-1ubuntu0.22.04.1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.2-1",
        "2.12.3-1",
        "2.12.3-1ubuntu0.22.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libasync-http-client-java",
            "binary_version": "2.12.3-1ubuntu0.24.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "async-http-client",
        "purl": "pkg:deb/ubuntu/async-http-client@2.12.3-1ubuntu0.24.04.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.3-1",
        "2.12.3-1ubuntu0.24.04.1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libasync-http-client-java",
            "binary_version": "2.12.3-1ubuntu1.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "async-http-client",
        "purl": "pkg:deb/ubuntu/async-http-client@2.12.3-1ubuntu1.1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.3-1",
        "2.12.3-1ubuntu1",
        "2.12.3-1ubuntu1.1"
      ]
    }
  ],
  "aliases": [],
  "details": "The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12  and 2.16.1, Realm.Builder generates the HTTP Digest client nonce with ThreadLocalRandom rather than a cryptographically secure random source. Digest relies on an unpredictable cnonce to resist chosen-plaintext and credential precomputation attacks, so an observer able to infer generator state can reduce the protection of the authentication exchange. This issue is fixed in versions 3.0.12 and 2.16.1.",
  "id": "UBUNTU-CVE-2026-107283",
  "modified": "2026-10-08T00:00:00Z",
  "published": "2026-10-08T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-107283"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-107283"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-mfj3-87qq-382v"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AsyncHttpClient/async-http-client/commit/e1f5fc88fe211d3f64032c33b91093ba3d5e793d"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AsyncHttpClient/async-http-client/commit/dca2d90db87f0144ea893a6858dca13c426d06b6"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AsyncHttpClient/async-http-client/commit/e1f5fc88fe211d3f64032c33b91093ba3d5e793d"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.12"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-107283"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-107283 (GCVE-0-2026-107283)

FKIE_CVE-2026-107283

GHSA-MFJ3-87QQ-382V

Impact

Affected versions

Patches

Workarounds

Details

UBUNTU-CVE-2026-107283 (CVE-2026-107283)

Tags

Sightings

Nomenclature

Related by attack behaviour